Fixed data type on comparisons.

ZString.cpp

@@ -110,9 +110,9 @@ namespace coreutils {
       return (strncmp(data, valuex.data, length) == 0);
    }
 
-   bool ZString::operator!=(const ZString &valuex) const {
-//      if(length != valuex.getLength())
-//	return false;
+   bool ZString::operator!=(const ZString valuex) const {
+      if(length != valuex.getLength())
+	return true;
       return (strncmp(data, valuex.data, length) != 0);
    }